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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2005-05-09 23:21:59 +0100
committerRussell King <rmk@dyn-67.arm.linux.org.uk>2005-05-09 23:21:59 +0100
commit05ab3014636ff60a319d37cdf37dca594b015eec (patch)
treed9d948a5ecd5e10cd511ebca328df2ef08d5e076 /include
parent88d7bd8cb9eb8d64bf7997600b0d64f7834047c5 (diff)
[PATCH] Serial: Add uart_insert_char()
Add uart_insert_char(), which handles inserting characters into the flip buffer. This helper function handles the correct semantics for handling overrun in addition to inserting normal characters. Signed-off-by: Russell King <rmk@arm.linux.org.uk>
Diffstat (limited to 'include')
-rw-r--r--include/linux/serial_core.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index c3fb5984f25..d6025af7efa 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -479,6 +479,25 @@ uart_handle_cts_change(struct uart_port *port, unsigned int status)
}
}
+#include <linux/tty_flip.h>
+
+static inline void
+uart_insert_char(struct uart_port *port, unsigned int status,
+ unsigned int overrun, unsigned int ch, unsigned int flag)
+{
+ struct tty_struct *tty = port->info->tty;
+
+ if ((status & port->ignore_status_mask & ~overrun) == 0)
+ tty_insert_flip_char(tty, ch, flag);
+
+ /*
+ * Overrun is special. Since it's reported immediately,
+ * it doesn't affect the current character.
+ */
+ if (status & ~port->ignore_status_mask & overrun)
+ tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+}
+
/*
* UART_ENABLE_MS - determine if port should enable modem status irqs
*/